The peacoat is a staple of maritime service as timelessly fashionable as it is warm. If you enlist in the Navy, you can get one from Supply for free; if you’re a civilian, you can head to an Army-Navy surplus store and pick one up for less than $100. Or, if you can only be warmed by unearned rank insignia and wool/cashmere blends made in Italy, there’s this $3,500 pea coat from Ralph Lauren.